American Thoracic Society Documents 401 Figure 2. Algorithm forinitiating empiric antibi-otic therapy for hospital-acquired pneumonia (HAP),ventilator-associated pneu-monia (VAP), and health-care-associatedpneumonia(HCAP). Figure 2.
One milligram is one thousandth of a gram and one thousand micrograms. A milligram is generally abbreviated as mg. MICROGRAM. One microgram is one millionth of a gram and one thousandth of a milligram. It is usually abbreviated as mcg or ug. Mcg and ug are the same.
In comparison, 1 milligram equals 1,000 times 1 microgram. Both units are used in the field of medicine to administer drug dosage. Microgram's symbol is Âµg, but the abbreviation mcg is used in medicine so as to avoid confusion with milligram's symbol (mg). Learn more about Chemical Equations